Mounting for electric switch and panel bases



April 1 1924. 1,488,669

B. E. GETCHELL MOUNTINGFOR ELECTRIC SWITCH AND PANEL BASES Filed March 8, 1920 ffl ' Patented Apr. I, 1924.-

UNITED 4STATES,

i A 1,488,669 PATENT OFFICE.:

l BENJAMIN GETCIIELL, or PLAINVILLE, CONNECTICUT, A'ssIoNon To THE TRU'M- BULL ELECTRIC MANUFACTURING COMPANY, OE PLAINVILLE, CONNEC'IICU'I, A

CORPORATION or CONNECTICUT.

MOUNTING FOB ELECTRIC SWITCH AN'D 'PAITEJJ BASES.

Application led March 8, 1920. -Serial No. 364,005.

To all whom t may Concern:

Be it known that I, BENJAMIN l ELL,` a citizen of the .United States of f America, residing at Plainville, Hartford f County, Connecticut, have' invented 'a new ort these bases in metal boxes or containers.`

ith the constructions ordinarily employed the bases are frequently brokenor cracked in assembling or `in transportation. The

main object of my invention is to provi-dev a simple and economical form of construction which will avoid these difficulties.

In its preferred form the invention contemplates the provision of a series of raised bosses carried by the box and fitting into corresponding recesses in the insulating base and screws passing throu h the insulating base/and seated in these osses. These bosses or parts of them are formed separatel from the box and are suitably secure thereto.`

Figure 1 is a cross sectional view of a fragment of a box, showing an insulatin 80 base held in position by a single screw, an

l also showin the position forfanother screw. It will be o served that ordinarily four or more bosses and screws will be provided Figure 2fis a plan view of one corner of 85 a box, showing` a single boss;

Figure 3 is a bottom view of ,the same;

Figure 4 is a sectional .view of one of the bosses; a p

Figure 5 isa sectional view of tne insulating base, taken through one of the screw passages and recesses for a boss;

' Figure 6' is a perspective view of one form of boss before aembling it andsecuring it in the base; 2

grm of boss attached `to a fragment vof -a x' Figure 8 is a bottom view of the same. The` box 10l may 00 struction, ordinarlly sheet metal.v

' AThe insulating base 11 is designed to carry any` form' of switch or fuse mechanism or other electrical appliances.

Each boss, suchras 12, is formed separately bottom of the box.

Figure 7 is a sectional lview of a modified f be of any suitable confrom the box, and is preferably curved on E. GE'roH--' its upper surface so as to fit intoa curved recess 13 in the underside ofthe insulating base 11.

A series of screws, such as 14, are adapted to secure the vbase imposition, each screw passing through a hole 15 in the base and threadmg into a tapped hole or seat 16 in the boss 12. To prevent the boss from rotating a part lof, it, such as 17, maybe angular in form and located in a correspondingly-sha ed recess 18 in the back of the bottom oi) the box. A art ofthe bottom of the box may be raise as at 19, to form-` a part of the curved supporting element engaging the curved recess or seat 13 in the insulating base. The boss may be conveniently formed from a blank, such as shown in. Fig. 6, where the portion 12 is ada ted to be projected through an opening `in t ebottom of the box and spun over or upset into the form shown in Figs. 1 and 4. The above construction serves to support the insulating base at aplurality of points, with a space 2O between the u"base and the This facilitates the assembling of a base in a box b accurately locating'the proper relative position, so that the screws can be readily inserted and seated.

j) This construction also securely holds'the insulating `base vin osition in the box without straining the ase or tendi rto chip or fracture it incase force is 4app red, tending to displace the base with respect to the box, InrFigs. 7 and 81 have shown a modification in which all of the boss 12 is formed by theinserted member, which is held from rotation by one or more angular projections, such as 17 engaging the. bottom 10 of a box.

I claim;

1. In a construction. of the character de` scribed, the combination of a box, a plurality of raised bosses formed 'se arately from the box but secured thereto an spaced apart from each other, an insulating base having curved *seats lco-acting with said* bosses, and screws passin throu h said base. and screwed into said; osses or securing the base to said box.

2. In a construction oi the character described, a combination of a box, a pluralit of separately formed bosses havingcurv A bearing surfaces, means for securing said bosses in said box, an insulating base having seats corresponding with and engaging said bosses to ,position said base in said box and prevent lateral shifting of said base in said box and screws passing through said base and engaging in said bosses to hold the parts together.

3. In a construction of the character described, the combination of a box having raised portions extending inwardly from the bottom of the box, a separately formed meniber secured to each raised portion and having a screw seat, an insulating base having recesses fitting on said raised portions and having holes in line with said recesses, and screws passingthrough said holes into said screwseats for securing the base to said box.

4. In a construction of the character described, a metal box, a plurality of separately formed bosses having curved surfaces secured to said box, an insulating base having a plurality of recesses corresponding -substantial'lyin shape to the curved surfaces of the bosses and means for securing said base to said box With the corresponding bosses and recesses engaging with each other to position the base in the box- BENJAMIN E. GETCHELL. 

